55151111 has 8 divisors (see below), whose sum is σ = 59498064. Its totient is φ = 50926720.

The previous prime is 55151099. The next prime is 55151123. The reversal of 55151111 is 11115155.

It is an interprime number because it is at equal distance from previous prime (55151099) and next prime (55151123).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55151111 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55151311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29705 + ... + 31506.

It is an arithmetic number, because the mean of its divisors is an integer number (7437258).

Almost surely, 2^55151111 is an apocalyptic number.

55151111 is a deficient number, since it is larger than the sum of its proper divisors (4346953).

55151111 is a wasteful number, since it uses less digits than its factorization.

55151111 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 61281.

The product of its digits is 125, while the sum is 20.

The square root of 55151111 is about 7426.3794004885. The cubic root of 55151111 is about 380.6432112012.

Adding to 55151111 its reverse (11115155), we get a palindrome (66266266).

The spelling of 55151111 in words is "fifty-five million, one hundred fifty-one thousand, one hundred eleven".